•Named after a Soviet Spy, Victor.
In this cipher, we need a grid called the 'Straddling Checkerboard':
0 1 2 3 4 5 6 7 8 9
E T A O N R I S
2 B C D F G H J K L M
6 P Q / U V W X Y Z .
(Check the photo for a better reference)
We also need a secret sequence of four digits.
Examples:
1. Encrypt 'Black Magic'
•Using the grid, we first look for the coordinates where each letter is located. The row number muna bago yung column, like how we do the Polybius Square.
B L A C K M A G I C
20 28 3 21 27 29 3 24 8 21
•Tapos, gawin nating ganto yung coordinates:
2 0 2 8 3 2 1 2 7 2 9 3 2 4 8 2 1
Sineparate lang natin yung mga 2 digit na coordinates.
•Then, we think of the secret sequence. Ang gagamitin natin sa example ay 1714. I-aadd natin siya.
2 0 2 8 3 2 1 2 7 2 9 3 2 4 8 2 1
+ 17 1 4 1 7 1 4 1 7 1 4 1 7 1 4 1
= 3 7 3 2 4 9 2 6 8 9 0 7 3 1 9 6 2
*If the sum has 2 digits, we get the ones place.
•We now have a new set of coordinates.
3 7 3 24 9 26 8 9 0 7 3 1 9 62
*Coordinates 0,1,3,4,5,7,8,&9 can be a coordinate alone. However, 2 and 6 must have kasama.
•Finally, we now convert these into letters using the grid.
3 7 3 24 9 26 8 9 0 7 3 1 9 62
A R A G S J I S E R A T S /
•The encrypted word for "Black Magic" is ARAGSJISERATS/
2. Decrypt ARAGSJISERATS. SS:1714
•Using again the grid, kunin natin coordinates niya.
A R A G S J I S E R A T S /
3 7 3 24 9 26 8 9 0 7 3 1 9 62
•Then, subtract the sequence 1714
3 7 3 2 4 9 2 6 8 9 0 7 3 1 9 6 2
- 1 7 1 4 1 7 1 4 1 7 1 4 1 7 1 4 1
= 2 0 2 8 3 2 1 2 7 2 9 3 2 4 8 2 1
*If the minuend(sa taas) is lower than the subtrahend (sa baba), carry one lang pero huwag nang mag-borrow sa katabi niyang numero.
•20 28 3 21 27 29 3 24 8 21
Hanapin na natin to sa grid ulit.
20 28 3 21 27 29 3 24 8 21
B L A C K M A G I C
•The decryted form of ARAGSJISERATS is BLACK MAGIC.
Now try these:
1. Encrypt Hydroflouric Acid with the ss 1324
2. Decrypt PHARTASEGT with the ss 1201
~~~CTTRO
